Here are two cool examples of augmented reality apps/prototypes that are already out. The first is a really fun one from GE's futuristic Ecoimagination campaign. By making a print-out from their site and holding it in front of your monitor it brings the animation out of the box and into your room. Here's the Future is Awesome's Duncan Rawlinson demonstrating it with the print out attached to his mobile.

Another very cool, though early incarnation technology that gives us a hint of how we'll be interacting with information in our physical environments comes to us from the MIT Media Lab - demoed at the recent TED conference (via Wired).

It's "a wearable computer system that turns any surface into an interactive display screen." Definitely has some of that early stage Minority Report feel to it and I think when looking at these two examples it's pretty obvious that this world will be here sooner than most people think.